| 房间混响时间与隔声量的测量分析实验研究 |
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| 引用本文： | 翁棣,秦雨,陈高鸣,郑卓联,翟国庆.房间混响时间与隔声量的测量分析实验研究[J].实验室研究与探索,2020(1):157-164. |
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| 作者姓名： | 翁棣 秦雨 陈高鸣 郑卓联 翟国庆 |
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| 作者单位： | ;1.浙江大学国家级环境与资源实验教学示范中心 |
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| 基金项目： | 国家自然科学基金项目(10604048);国家级实验教学示范中心建设项目(教高厅函[2016]7号)。 |
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| 摘 要： | 隔声测量是绿色建筑评价的重要组成部分,建筑隔声是隔绝外界噪声的重要手段之一。因此建筑和建筑构件的隔声量测量技术的完善对降低噪声污染、促进人居声环境的改善有重要意义。混响时间是室内声学最重要、最精密的客观音质评价参量,用赛宾公式表达混响时间与房间的隔声量的相关性。以环境物理实验室为研究对象,运用切断声源法,对其混响时间和隔声量进行测量。结果显示,房间的混响时间均处于0.60~0.90 s的范围,且随频率的增加先减小再增大,于中高频段达到稳定值0.8 s,然后再小幅度减小。房间的隔声能力由表观隔声量与标准化声压级差表征,两者变化趋势一致,表现为随频率增加呈递增趋势,在测量区间由15 dB增加到30 dB。
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| 关 键 词： | 混响时间 表观隔声量 标准化声压级差 频率特性曲线 |
Experimental Study on Measurement and Analysis of Room Reverberation Time and Sound Insulation |
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| WENG Di,QIN Yu,CHEN Gaoming,ZHENG Zuolian,DI Guoqing.Experimental Study on Measurement and Analysis of Room Reverberation Time and Sound Insulation[J].Laboratory Research and Exploration,2020(1):157-164. |
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| Authors: | WENG Di QIN Yu CHEN Gaoming ZHENG Zuolian DI Guoqing |
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| Institution: | (National Demonstration Center for Experimental Environment and Resource Education,Zhejiang University,Hangzhou 310058,China) |
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| Abstract: | Sound insulation measurement is an important part of green building evaluation,and building sound insulation is one of the important means to isolate external noise.Therefore,the improvement of sound insulation measurement technology for building and building components is of great significance to reduce noise pollution and promote the improvement of the sound environment of human settlements.Reverberation time is the most important and precise objective sound quality evaluation parameter in indoor acoustics.The correlation between reverberation time and sound insulation in a room is expressed by Sabine formula.Taking the Environmental Physics Laboratory of Zhejiang University as the research object,the reverberation time and sound insulation of the laboratory were measured by cutting off the sound source method.The results show that the reverberation time of the room is in the range of 0.60-0.90 s,and decreases first and then increases with the increase of frequency,reaching a stable value of 0.8 s in the middle and high frequency bands,and then decreases slightly.The sound insulation capacity of the room is characterized by the apparent sound insulation capacity and the standard sound pressure gradient.The change trends of the two variables are the same,showing an increasing trend with the increase of frequency and an increasing trend from 15 dB to 30 dB in the measurement range. |
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| Keywords: | reverberation time apparent sound insulation normalized sound pressure frequency characteristics |
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